Question: What is the raising agent with the highest sublimation temperature whose topic's main category is Category:Carbon dioxide?
Paraphrase: In the category Carbon dioxide, which agent has the highest sublimation temperature?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q908833 . ?ent wdt:P2113 ?obj . ?ent wdt:P910 wd:Q7461951 } ORDER BY DESC(?obj)LIMIT 5